The BMA7318, BMI7318, BMA7518 is a Li-ion battery cell controller IC designed specifically for automotive HVBMS, industrial ESS, and 48 V applications. It can monitor up to 18 battery cells and 12 temperatures. The BMA7318, BMI7318, BMA7518 features configurable averaging of cell voltage measurements through digital filtering, onboard balancing up to 300 mA, and integrated current measurement, this device supports ISO 26262, up to ASIL C safety capability and high integrity safety levels up to industrial SIL 2.
The BMA7318, BMI7318, BMA7518 also includes an integrated communication bridge (SPI2TPL) with robust isolated 2.0 Mbit/s communication. The BMA7318, BMI7318, BMA7518 is designed to provide up to 25 years of ESS application lifetime with an extended mission profile (EMP) and shares a product family approach with PIN2PIN compatibility between the BMA7318, BMI7318, BMA7518 devices.
| Parameter | BMA7318FAIAE | BMA7318TAIAE | BMA7318TANAE | BMA7518SAIAE | BMI7318TANAE |
|---|---|---|---|---|---|
| Voltage Channel | 4..18 | 4..18 | 4..18 | 4..18 | 4..18 |
| Supply Range (Max) | 9 V..90 V (94 V) | 9 V..90 V (94 V) | 9 V..90 V (94 V) | 9 V..90 V (94 V) | 9 V..90 V (94 V) |
| Cell Voltage Range | -0.3 V to 5 V | -0.3 V to 5 V | -0.3 V to 5 V | -0.3 V to 5 V | -0.3 V to 5 V |
| Cell Measurement Error | ±1 mV | ±1 mV | ±1 mV | ±1 mV | ±1 mV |
| Vcell=3.1 V..3.35 V | Vcell=3.1 V..3.35 V | Vcell=3.1 V..3.35 V | Vcell=3.1 V..3.35 V | Vcell=3.1 V..3.35 V | |
| Tj=-40 °C..65 °C | Tj=-40 °C..65 °C | Tj=-40 °C..65 °C | Tj=-40 °C..65 °C | Tj=-40 °C..65 °C | |
| Cell Measurement Error After Lifetime | ±1.5 mV | ±1.5 mV | ±1.5 mV | ±1.5 mV | ±1.5 mV |
| Vcell=3.1 V..3.35 V | Vcell=3.1 V..3.35 V | Vcell=3.1 V..3.35 V | Vcell=3.1 V..3.35 V | Vcell=3.1 V..3.35 V | |
| Tj=-40 °C..65 °C | Tj=-40 °C..65 °C | Tj=-40 °C..65 °C | Tj=-40 °C..65 °C | Tj=-40 °C..65 °C | |
| Communication Port | SPI with SPI2TPL bridge | TPL | TPL | SPI | TPL |
| CB MOSFET Rdson | 1.5 ohm | 1.5 ohm | 1.5 ohm | 1.5 ohm | 1.5 ohm |
| CB Current Max | 300 mA | 300 mA | 300 mA | 300 mA | 300 mA |
| AIN Channels | 10 | 10 | 12 | 10 | 12 |
| GPIO Channel | 10 | 10 | 10 | 10 | 10 |
| I²C Controller | full I²C leader | full I²C leader | full I²C leader | full I²C leader | full I²C leader |
| Current Channel | Yes | Yes | No | Yes | No |
| Coulomb Counter | Yes | Yes | No | Yes | No |
| Package | 64-pin LQFP-EP | 64-pin LQFP-EP | 64-pin LQFP-EP | 64-pin LQFP-EP | 64-pin LQFP-EP |
When it comes to functional safety, NXP stands for quality and reliability. Our SafeAssure program simplifies system-level safety requirements in accordance with ISO 26262.
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